/Engine/Plugins/Runtime/CommonUI/Source/CommonUI/Public/CommonActivatableWidget.h
Ask for focus to be re-set to our current DesiredFocusTarget, but only if our node is currently the leaf-most active node (no stealing!). This is useful for complex cases like: the buttons animate in from off-screen, or the buttons are deeply nested in a multi-switcher hierarchy and it would be burdensome to wrap each element in a CommonActivatableWidget.
void RequestRefreshFocus()